If somebody is looking for a secure messenger....

Check:

SecureMessagingApps.com

Rate:
🟩=3 🟨=1 🟥=0

Results:

1. Threema = 86 = most secure Messenger

2. Signal = 80
3. Session = 77
4. Wire = 68
5. SimpleX Chat = 67
6. Wickr (Amazon) = 61
7. Element / Matrix = 56
8. Apple iMessage = 37
9. WhatsApp = 32
10. Telegram = 27
11. Facebook Messenger = 26
12. Microsoft Skype =10
 

 Any of those uses Nostr?